I like this. A few things are apparent immediately. Obama, obviously is black and different from the other presidents. At the same time, all the presidents, including our current president look ancient and faded into history. Obama on the other hand gives off a vibrant young energetic impression, symbolizing change that the country needs. This seems like an anti-Obamatmnd at first impression but supports Obama and hope instead. The weathered grainy pictures of GWB and Clinton were intentional.